Métacognition et théories de l'esprit

Dans cette présentation des travaux concernant plusieurs aspects du fonctionnement psychologique (langage, perception, explication des actions, apparence/réalité, etc.) on décrit l'évolution—au cours de l'enfance—des représentations relatives au fonctionnement mental des êtres humains. Il apparaît tout d'abord que, très précocement, l'enfant dispose de connaissances et de représentations relatives à l'esprit humain: lesquelles lui permettent de différencier entités mentales et physiques, d'attribuer divers états mentaux aux êtres humains, d'expliquer les actions humaines en référence à des états mentaux tels les désirs et les croyances, etc. Toutefois, aux alentours de 5 ans, d'importants changements qualitatifs se manifestent dans la connaissance qu'ont les enfants de la vie' mentale. Ainsi, à une conception de l'esprit humain comme réservoir d'états mentaux (résultant du contact direct avec la réalité) succéderait une conception de l'esprit comme médiateur, générateur d'états mentaux.     

Biological preparedness and evolutionary explanation

It is commonly supposed that evolutionary explanations of cognitive phenomena involve the assumption that the capacities to be explained are both innate and modular. This is understandable: independent selection of a trait requires that it be both heritable and largely decoupled from other 'nearby' traits. Cognitive capacities realized as innate modules would certainly satisfy these contraints. A viable evolutionary cognitive psychology, however, requires neither extreme nativism nor modularity, though it is consistent with both. In this paper, we seek to show that rather weak assumptions about innateness and modularity are consistent with evolutionary explanations of cognitive capacities. Evolutionary pressures can affect the degree to which the development of a capacity is canalized by biasing acquisition/learning in ways that favor development of concepts and capacities that proved adaptive to an organism's ancestors.     

Age-related changes of phasic heart rate responses to affective pictures

This study examined age differences in phasic heart rate in response to neutral, negative and positive pictures. Heart rate changes and subjective ratings were analyzed in 22 middle-aged (40-55 years) and 30 older (56-78 years) participants. The effects of valence on the HR pattern across time were similar to that obtained by Bradley and co-workers. Conversely to previous studies, we did not report any age-related reduction in cardiac reactivity. Instead, when viewing positive pictures, the triphasic wave form appeared in the group of older adults, but for younger participants, it was replaced by a sustained deceleration. These results were interpreted in the light of the socioemotional selectivity theory.     

Neonatal odor-shock conditioning alters the neural network involved in odor fear learning at adulthood

Adult learning and memory functions are strongly dependent on neonatal experiences. We recently showed that neonatal odor-shock learning attenuates later life odor fear conditioning and amygdala activity. In the present work we investigated whether changes observed in adults can also be observed in other structures normally involved, namely olfactory cortical areas. For this, pups were trained daily from postnatal (PN) 8 to 12 in an odor-shock paradigm, and retrained at adulthood in the same task. (14)C 2-DG autoradiographic brain mapping was used to measure training-related activation in amygdala cortical nucleus (CoA), anterior (aPCx), and posterior (pPCx) piriform cortex. In addition, field potentials induced in the three sites in response to paired-pulse stimulation of the olfactory bulb were recorded in order to assess short-term inhibition and facilitation in these structures. Attenuated adult fear learning was accompanied by a deficit in 2-DG activation in CoA and pPCx. Moreover, electrophysiological recordings revealed that, in these sites, the level of inhibition was lower than in control animals. These data indicate that early life odor-shock learning produces changes throughout structures of the adult learning circuit that are independent, at least in part, from those involved in infant learning. Moreover, these enduring effects were influenced by the contingency of the infant experience since paired odor-shock produced greater disruption of adult learning and its supporting neural pathway than unpaired presentations. These results suggest that some enduring effects of early life experience are potentiated by contingency and extend beyond brain areas involved in infant learning.     

Emergence of an egocentric cue guiding and allocentric inferring strategy that mirrors hippocampal brain-derived neurotrophic factor (BDNF) expression in the Morris water maze

From insects to humans, successful navigation relies on retained representations of spatial relations. These representations are thought to depend on the hippocampal formation, particularly those that are independent of the navigator (allocentric representations). The Morris water maze is a simple and popular task often used to assess spatial navigation. But how animals navigate toward and retain information regarding the location of the goal in this task remains unclear. We provide a comprehensive account of how the water maze is accomplished behaviourally. Our findings suggest that animals solve the task using distal cues via an initial view-matching strategy that is supported by egocentric guidance. Through increased training, however, an emergence of an egocentric-guiding strategy combined with the animal’s greater ability to infer the hidden platform’s location (via allocentric extrapolation) emerges. We also demonstrate that behavioural changes, towards a more allocentric strategy, are reflected in increases in hippocampal brain-derived neurotrophic factor.     

Are perceptions of fairness relationship-specific? The case of noblesse oblige

Research in experimental economics suggests that decision making in strategic interactions is often guided by a concern for fairness. However, experimental economics studies routinely place participants of equal social status and no prior social history in anonymous interactions, a context that would tend to foster the adoption of an egalitarian fairness norm. Extensive research in anthropology (Fiske, 1991) and psychology (Bugental, 2000) suggests that social norms, including fairness norms, are relationship-specific, raising doubts about whether the concern for egalitarian fairness observed in the experimental economics literature would generalize to a wider range of social relations. In this paper we focus on an alternative social norm characteristic of hierarchical relationships: noblesse oblige—the obligation of high-ranking individuals to act honorably and beneficently towards subordinates. In a series of five experiments, we show that the norm of noblesse oblige predicts tolerance of free riding better than individual self-interest does.     

The Validity of Subjective Wellbeing Measurement for Children: Evidence Using the Personal Wellbeing Index—School Children

Research is scarce concerning the validity of subjective wellbeing measures for children aged 12 years and less. There are even fewer subjective wellbeing data for children with complex backgrounds and personal circumstances and those experiencing socio-demographic disadvantage. This study compares the psychometric properties of the child and adult versions of the Personal Wellbeing Index. Participants were 1761 ‘at-risk’ children aged 10–12 years, and 2000 geographically representative Australian adults. While there was sufficient fit with a one-factor structure, the reliability estimates were lower in the child sample and the incidence of response bias was significantly higher. Collectively, these findings suggest caution in the use of subjective wellbeing measures with children.     

Work environment structure and psychological ownership: the mediating effects of control

Current theorists on the psychology of possession highlight control as an important route in the development of feelings of ownership. In the present article, the authors hypothesized that the extent to which individuals experience control over their job and work environment is positively associated with feelings of ownership for their job and the organization. The authors used supervisory report data on work environment structure and self-reports on experienced control and psychological ownership to test for the mediating effects of experienced control in the relationship between the work environment structure and psychological ownership. The authors found that experienced control mediates the relationship between 3 sources of work environment structure--technology, autonomy, and participative decision making--and psychological ownership of the job and (to a lesser extent) the organization. The authors proposed implications of the findings and directions of further research.     

Preventing substance abuse in American Indian and Alaska native youth: promising strategies for healthier communities

Substance abuse has had profoundly devastating effects on the health and well-being of American Indians and Alaska Natives. A wide variety of intervention methods has been used to prevent or stem the development of alcohol and drug problems in Indian youth, but there is little empirical research evaluating these efforts. This article is an overview of the published literature on substance use prevention among Indian adolescents, providing background epidemiological information, a review of programs developed specifically for Indian adolescents, and recommendations for the most promising prevention strategies currently in practice.